以下是引用freegirl在2003-9-22 11:33:00的发言: 35. For similar cars and drivers, automobile insurance for collision damage has always cost more in Greatport than in Fairmont.    olice studies, however, show that cars owned by Greatport residents are, on average, slightly less likely to be involved in a collision than cars in Fairmont. Clearly, therefore, insurance companies are making a greater profit on collision-damage insurance in Greatport than in Fairmont. Which of the following is an assumption on which the argument depends? A. Repairing typical collision damage does not cost more in Greatport than in Fairmont. ==>> 不知道这个 assumption 是不是也可以? The number of cars own the collision damage insurance purchased by Greatport residents is at least no less than that by Farimont residents. 这个是我自己想的。 题目说:一个 collision-damage-insured car in Greatport costs more than in Farimont, 总体的 collision-damage-insured cars in Greatport 比 those in Farimont 有稍微 多一点的机会发生accidents. 结论是:保险公司在Greatport's cars insurance 上挣的利润要高于在Farimont's cars insurance 我的思路是: 如果the number of cars owned by Greatport residents who don't purchase the insurance is much higher than that owned by by Farimont residents, 结论就难以成立,因为总体的 profits 是要靠购买保险的车的量来决定的。 写到这里,好像又有些不对,但一时又感觉不到。 原来的答案 A 是对个别车的 修理费用而言的,那么,我想问:原题中的结论的 profit到底是整体的两地车的比较还是单个的两辆不同地方的车的比较呢? 请多讨论。很多时候我发现我敲的过程正是帮我理清思路的过程。谢谢谢谢谢谢!   
保险公司的利润= 保费收入---赔付支出 警察认为: Greatport 保费收入>Farimont保费收入, so think it got more profie. This argument is assume that 赔付支出 are almost same between them. so a is correct: A. Repairing typical collision damage does not cost more in Greatport than in Fairmont.
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